Elvas, Christmas of 1807. Sister Maria de Santa Teresinha, superior of a congregation forced by the French to assist their troops during the invasions, receives the news that Napoleão Bonaparte is going to visit the Forte da Graça. The nun can not stand the shock and falls struck by a heart attack.

Lisbon, 2016. Salvador summons the patrol. Amélia, Pacino, and Afonso are informed of the serious events unfolding in Elvas in 1807. Contrary to what historians say, the Ministério do Tempo has always known of a short and secret visit by Napoleão to Elvas, with the aim of supervising the Advances of General Soldano. This visit, forgotten by history, is of fundamental importance for the Portugal we know today. It was during the Christmas eve of 1807 that the sister Maria de Santa Teresinha convinced Napoleão to pardon three Portuguese prisoners, condemned by espionage and condemned to the death. One of them, Rodolfo Maia, is the direct ancestor of Captain Salgueiro Maia, one of the heroes of April 25.

Before leaving, the patrol needs someone who can replace Sister Maria de Santa Teresinha. The choice fell on ... Maria dos Prazeres, who will go on her first mission.

Afonso is dismissed, since he's entitled to a few days off in order to adapt to live in the 21st century. However, he's quickly sent to 1807 when the rescue of Rodolfo Maia seems impossible and the life of Maria dos Prazeres is at risk.

But Maria dos Prazeres has not given up yet. And she will use all her weapons to persuade Napoleão to release the prisoners.

By 2016 other plans are in full swing. Irene and Susana Meireles feel their time has come. But for that, they have to get rid of Salvador.